Schaefer WS-390 WS 390 Aluminum Exhaust Fan Shutter Outlet 39 Inch

Schaefer WS-390 aluminum shutter is built tough to last a lifetime in the harshest environments.

Schaefer's aluminum fan shutters restrict the airflow to one direction & are utilized as building air flow inlets, for feeding exhaust fans, or to prevent air intrusion when exhaust fans are not operating.